Switch-stand



(No Model.)

' W. A. BOG'K. SWITCH STAND.

No. 447,424. Patnted Mar. 3, 1891.

UNITED STATES APiyrlngiT OFFICE.

)VILLIAM A. BOCIQ'OF CHICAGO, ILLINOIS.

swn'cHi-STAN D.

SPECIFICATION forming part of Letters Patent No. 447,424, dated March 3, 1891. Application tiled November 19, 1890. Serial No.371l925. (No model.)

an improvement upon that patented to me by.

the United States, No. 437 ,966, dated October 7, 1890.

The object of my invention is to 'provider for the more thorough protection of the working parts both from accidental injury and from clogging. The yielding clutch, which is operated by the passage of the train, is constructed somewhat different] yfromthatshown in my former patent above named, as will appear from the description which follows.

In the accompanying drawings,Figure l is a side elevation of my switch-stand. Fig. 2 is a vertical section of the same, the point of view being at right angles to that of Fig. 1. Fig. 3 is ahorizontal section on line 3 3, Fig. 2. Figs. 4, 5, and 6 illustrate details hereinafter described. f

A is the frame or body of the stand, through which passes the shaftvB, having at its lower end the crank C, the latter being connected by the rod D to the switch. To the shaft B is keyed a block E, which block has a cavity whose opposite sides e e 4are parallel. Said cavity extends through the side of the block E. On the top of the stand A is fitted a cap F. From its upper side rises a square or polygonal projection or boss f, and its lower side has asleevef, the upper portion of which is made to iit the bearings in the block G, said block being keyed or otherwise fastened in the top of the stand A. The lower part of the sleeve f is squared or furnished with a feather, so that the sliding4 clutch-block I-I fitted thereto is free to move longitudinally of the sleeve f', but cannot revolve upon it.

vThe lower face of the block G and the upper face of the block H are made so as to form a yielding lock with each other, the spring I ploythis form; but it .is not essential to the invention herein described that these faces should be so formed.' v

The upper end ofthe bossf is made circular, as indicated in Fig. 2, so as to fit the corresponding cavity in the block E.

Fig. 5 shows a longitudinal section of the cap F and its upper and lower extensions. The projection f of the cap is of such size that its diameter measured across vits diagonal is equal to or slightly less than the distance between the parallel faces e c of the cavity within the block E, so that the block E and its attached shaft can revolve independently of the cap F. To lock the block E and the cap F together, I employ a forked lever whose construction is shown in Figs. 2 and 4. Said lever J is pivoted to the block E, as is also the lever shown in my prior patent; but instead of being made in a single piece, as

therein described, the forked portion J of the lever, which embraces the polygonal head of the cap F, is pivoted to the hand portion J. The forked portion j of the lever is best seen in Fig. 4. The fork fits between the parallel sides e c of the block E and the sides of boss f. (Vide Fig. 3.) Then the parts are in the position shown in Fig. 3 and in full lines in Fig. 2, the block E and the cap F are locked together. Vhen the hand-lever is raised to the position shown in the dotted line, the forked portion j is withdrawn from between the boss f andthe sides of the cavity within the block E, so that the block is free to revolve independently of the cap F. The inner ends of the frk of the part j are provided with hooks 7VJL, which, by catchingl upon the depending li p t' of the block E, prevent the entire withdrawal of the fork. Vide Figs. 2 and 4.) At ct is provided an eye for the insertion of a lock by which the withdrawal of the lever J may be prevented. The operation of the yielding clutch formed by the clutchblock G and I-I is described in my former patent. The pressure upon the crank C, tending to be caused by the passage of the train IOO and tending to rotate the switch-shaft B,will, if sulicient, cause the spring I to be depressed by the action of the sliding clutch-faces upon the block I-I. The rotation of the shaft, block E, and cap F, together with the clutch-block II, will thus be eected.

I claim l. The combination, in a switch-stand, of`

ing within the cavity of said block, anda" forked lever titted wit-hin said cavity and over said polygonal boss, whereby said block and cap may be locked together or may, by Dalle withdrawal of said forked lever, be released from each other, substantially as described.

2. In a switch-stand, the combination of a frame, a shaft revolnble therein and adapted to operate the switch,ablock secured to said shaft and having a cavity two of whose sides are parallel, a hand-lever having a `[forked portion titted within said cavity, a cap interposed between said block and said frame and extending within the cavity of said block and having the top of the polygonal section over which the forked end of said lever fits, sub' stantially as described.

3. The combination, in a switch-stand, of aframe, a shaft revolublc therein and adapted to operate the switch, a cap fitted to said frame and surrounding said shaft, a de\ ice adapted to lock said cap to said shaft, a clutch-block secured to said frame, and a sleeve formed upon or attached to said cap, having a yielding clutch-block adapted to engage with the first-named clutch-block and to slide upon said sleeve, but not to revolve thereon, and a spring maintaining the contact between said fixed and said yielding clutch-block, substantially as described.

4. The combination, in a switch-stand, of a frame and a shaft revoluble in said frame and adapted to operate. the switch, a block secured to said shaft and having a cavity therein whose two opposite sides are parallel, a hand-lever havinga forked end fitted within the parallel sides of said cavity, a cap interposed between said block and frame, having a polygonal bosscxtending within said cavity, said polygonal boss being fitted to the forked end of said lever, a sleeve extending below said cap and forming a part thereof or attached thereto, said sleeve being adapted to revolve within the stand and having a yielding clutch-block fitted to slide longitudinally thereon and revolve therewith, a fixed clutchblock adapted to engage with said yielding clutch-block, and a spring for maintaining contact between said clutch-block, substantially as described.

5. The combination, in a switch-stand, of a yieldinglock comprising a fixed clutch-block fitted to the frame of the switch-stand, a sleeve extending through said clutch-block so as to be Vcapable of revolution therein, a shaft adapted to operate the switch passing through said sleeve, and having devices adapted to lock it to and release it from said sleeve, a yielding clutch-block fitted to said sleeve so as to be capable of sliding longitudinally of said sleeve, but not to revolve thereon, and a spring for maintaining contact between said fixed and said yielding clutch-block, substantially as described.

WILLIAM A. BOCK.

Witnesses:

CHARLES B. YERGER, W. KASPAR. 

